State of The Art, Channel Assignment Multi-Radio Multi-Channel in Wireless Mesh Network

Abstract

The emergence of new-generation networking technologies and the wide-spread use of computers and wireless devices are providing opportunities for a new generation of powerful network systems. Recently, many researchers proposed several channel assignment (CA) algorithms in multi-radio multi-channel assignment (MR-MCA) wireless mesh networks (WMNs) to utilize available channels set in the network topology architecture. One of the key challenges faces MR-MCA is how to reduce the interferences to ensure the maximum throughput by improving the aggregate network capacity. There are several studies that have classified these CA algorithms into several approaches. The aim of this paper is to discuss the current channel assignment approaches in MR-MCA in wireless mesh networks and highlighting the state of the art for MR-MCA, which can help researchers and developers in the field of WMNs.

A dynamic channel assignment method for multichannel multiradio wireless mesh networks

“…WMNs have properties like quick installation, easy maintenance, low cost, high scalability, and dynamic self-organizing/recovery, which bring WMNs flexible characteristics. One of the most important advantages of WMNs is the ability of overcoming detected failures in the network and making up for the deficiencies of existing ad hoc networks, wireless local area networks (WLANs) and wireless personal area networks (WPANs), in view of the flexibility and connection reliability via multiple transmissions independently from the infrastructure [1]. Other advantages like robustness and reliable service area give them the opportunity to outshine other technologies.…”

On Demand Channel Assignment Method for Channel Diversity (ODCAM)

“…The channel assignment find the optimal maping between the radio and the channel to improve the network performance [8]. In this section we study the channel assignment methodes, the channel diversity and the MAC layer routing protocols.…”

“…The principal challenges with the dynamic approach is how to choose the appropriate channel. Additionally authors in [8] proposed a hybrid approach based on static and dynamic appraoches. This approach aims to combine the advantages of static and dynamic approaches.…”

“…The limitation of this approach is it does not utilize the network resources effectively and furthermore it does not care about the factors that affect network performances [8]. Where dynamic approaches assigns one radio interface to one or many channels [9].…”

“…The channel assignment is used to map the radio interface to the channel [8]. In order to increase the Wireless Mesh Network capaity, initaly each radio interface is assigned to one channel, until the intermediate node modifies it with the path selection process.…”